This paper describes the blind-test CFD activity of the EU 6th Framework project
GOAHEAD. This blind-test activity has been used to evaluate and assess the helicopter
CFD codes which are today in use in Europe and to scrutinize the wind-tunnel test
conditions with respect to the expected flow phenomena prior to the wind-tunnel test
campaign. Results are presented for an isolated fuselage test case, a low-speed (pitch-up)
test case, a cruise test case, a high-speed tail-shake test case and a highly-load rotor
(dynamic-stall) test case